This game needs a coin magnet! It is bad enough having to grind for hours to upgrade, but to have half of the coins disappear because you couldn't kill the zombies fast enough?
Umm..... Are the guns and Zombies supposed to do damage? I sat there on the level with like 30 zombies and didn't shoot and I was(am) fine. I am typing this while I am getting hacked at. :P
Some kind of tutorial would be nice, a clarification of what each item does, and the basic mechanisms of the game. Also, it gets boring VERY fast. Maybe add more gameplay elements?
Eh, we had a good run.